Tesla Motors has already proved that it can produce a credible electric vehicle thanks to its Roadster and Roadster Sport. The company is now putting the finishing touches on its Model S electric sedan, which is currently in beta testing.

The 2012 Model S will be available in three trim levels, delivering a driving range of 160 miles, 230 miles, and 300 miles respectively. Now, according to Green Car Reports, a "performance" version of the Model S will join the fleet to appease those that require a bit more "grunt" from their vehicles.

While the standard Model S can reach 60 mph in 5.6 seconds (a time that is quite respectable in its own right), the performance model will do the deed in less than 4.5 seconds. There is no word yet on what the driving range will be for the performance model.

While getting more performance out of the Model S is more than believable, Tesla Motors CEO Elon Musk may be teetering on the realm of believability with this next claim:

We’re also going to be offering aerodynamic wheels that will enable 320 mile range. There were some skeptics who said we couldn’t do a 300 mile range, but we’re going to do better than that. We’re going to offer 320 mile range, as tested on the EPA 2 cycle test.

A bonus 20 miles of range from just changing the wheels seems a bit unlikely, but we'll give Musk the benefit of the doubt on this one.

Below is a test drive video of the Tesla Model S during the first public unveil of the beta model.